I added a few more layers of detail, and some turbulence to the bozo
pigment.  I think it looks much more 'asteroidy' now, and less like an
unfortunate vegetable.

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Preview of image 'asteroid.jpg'

Mark Birch wrote:
> I added a few more layers of detail, and some turbulence to the bozo
> pigment.  I think it looks much more 'asteroidy' now, and less like an
> unfortunate vegetable.

Absolutely; bravo.

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High!

Larry Hudson wrote:

> Besides raytracing and computers, I've always been particularly 
> fascinated by pipe organs -- both classic/church style and theater style 
> -- and their appropriate music.  (These pipe organ styles are quite 
> different both in their sound and in their construction.)

Ah, theatre organs... have you heard this: 
http://www.hauptwerk.co.uk/AudioDemos/Hauptwerk2-MDAWurliTzer1.mp3 ?

Its from the famous Hauptwerk virtual organ project site... really 
groovy sound, I just imagine Richard Rodgers' famous "Slaughter on Tenth 
Avenue" being played on such an organ...

But my interest in organs currently focuses on 70s analogue electronic 
organs (of which of course quite a lot models were built in theatre 
style, for example the Dutch-made Eminent Grand Theatre series, or large 
Kimball organs such as the famous-infamous Xanadu) and of course classic 
electro-magnetic Hammonds.

B-3s are not exactly affordable these days, but at least I own two 70s 
transistorized analogue organs, a budget-class Eminent and a 
middle-class Yamaha (those Japanese organs are just indestructible and 
doing well even after 30 years!). But I still hope to get myself a 
Technics SX-U90 some day... the "dream ship" of my teenage days!

The small Eminent (a Solina P-240) I even started to model with PoV-Ray...

See you in Khyberspace!

Yadgar

Now playing: Is it Love? (Jon and Vangelis)
Now practising: Mr. Sandman

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High!

Mark Birch wrote:
> I added a few more layers of detail, and some turbulence to the bozo
> pigment.  I think it looks much more 'asteroidy' now, and less like an
> unfortunate vegetable.

Awesome... shows me how long a way I still have to go! But how long did 
it take to render?

See you in Khyberspace!

Yadgar

Now playing: Back to School (Jon and Vangelis)

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> Awesome... shows me how long a way I still have to go! But how long did
> it take to render?
>

Rendered in 2min 14s at 512x384 on a 1.8GHz P4 (no antialiasing).
Antialiasing slows it down quite alot, depending on settings.
I think the version I posted took about 8min with +am1 +a0.3

Here is the code:

// Asteroid
#version 3.6;
// ==============================================================
#default{finish{ambient 0}}
#global_settings{assumed_gamma 1.0 max_trace_level 5}

#declare f_bozo1 = // similar to noise3d
function{
  pigment{
    bozo
    noise_generator 3
    scale 0.35
    turbulence 0.30
    color_map{
      [0 color rgb 0]
      [1 color rgb 1]
    }
  }
}

#declare f_craters =
function{
  pigment{
    crackle form <1.2, 0, 0> // never really played with this one, thaks
Yadgar!
    turbulence 0.1 omega 0.6
    scale 0.15
    color_map{
      [0.00 color rgb 1.00] // centre of crater, lowest part
      [0.25 color rgb 0.75]
      [0.33 color rgb 0.25]
      [0.40 color rgb 0] // crater rim
      [1.00 color rgb 0] // level of area outside the crater
    }
  }
}

#declare f_granite =
function{
  pigment{
    granite
    scale 0.08
    color_map{
      [0 color rgb 0]
      [0.5 color rgb 0]
      [1 color rgb 1]
    }
  }
}

// --------------------------------------------------------------
isosurface{
  function{
    (x*x)+(y*y*2.2)+(z*z*1.5)-1
    +f_bozo1(x,y,z).red*0.300
    +f_craters(x,y,z).red*0.030
    +f_craters(x*2,y*2,z*2).red*0.020
    +f_granite(x,y,z).red*0.01
  }
  contained_by{box{<-1, -1, -1>, <1, 1, 1>}}
  threshold 0
  accuracy 0.005
  max_gradient 7.5
  texture{
    pigment{color rgb 1}
    finish{diffuse 1 brilliance 2}
  }
}

light_source{<-10, 10, 5> color rgb 1.5}
light_source{< 10, -10, -5> color rgb<0.2, 0.5, 1.0>*0.15}

camera{
  location <0, 1, -4>
  up y*(image_height/image_width)
  right x
  sky y
  look_at <0, 0, 0>
  angle 36
}
// -------------------------------------------------- end of file

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> Ah, theatre organs... have you heard this: 
> http://www.hauptwerk.co.uk/AudioDemos/Hauptwerk2-MDAWurliTzer1.mp3 ?

Love it!  :-)

> Its from the famous Hauptwerk virtual organ project site... really 
> groovy sound, I just imagine Richard Rodgers' famous "Slaughter on Tenth 
> Avenue" being played on such an organ...

I do have an old, monophonic recording of George Wright playing 
Slaughter, but at the moment I don't recall what specific organ it was on.

I'm attaching a photo of myself at my (electronic) organ.  I have fun 
with this picture, it's surprising how many people don't "get it". 
(Hint, it's a paste-up -- two shots cut and pasted then recopied.  I did 
this long before I had a computer, let alone, any graphics editor.)

      -=- Larry -=-

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Preview of image 'organ.jpg'

Larry Hudson wrote:
> 
> I'm attaching a photo of myself at my (electronic) organ.  I have fun
> with this picture, it's surprising how many people don't "get it".
> (Hint, it's a paste-up -- two shots cut and pasted then recopied.  I did
> this long before I had a computer, let alone, any graphics editor.)


could also be 1.

-- 
Eero "Aero" Ahonen
   http://www.zbxt.net
      aer### [at] removethiszbxtnetinvalid

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just followed this thread for a while, and as I'd a little time
yesterday evening, I played around with different layers and came up
with this one.

Still some texture issues. Maybe I'll try to add some normals as well.

...dave



> High!
> 
> Several days have passed, and I tried to improve the appearance of my
> asteroidal moon, mostly be applying additional 3D noise to the surface
> (in the case of the image attached here, by replacing the original
> noise_3d(x, y, z) by noise_3d(pow(x, 3), pow(y, 3), pow(z, 3)), which in
> fact added subtle waves to the terrain relief).
> 
> But still the problem is, that with the crackle pattern (with form set
> to <n, 0, 0>), the craters are in fact "bubbles" of empty space
> distributed randomly inside the raw isosurface moon body and not
> necessarily cut in half by its surface, so that many craters still are
> gaping holes rather than shallow depressions.
> 
> How can I get rid of this? Is there something like UV mapping for
> isosurfaces which guarantees that only craters cut in half by the
> surface are generated?
> 
> Is it possible to write a "core function" which, on the x-y plane,
> generates a roughly symmetric (perhaps slightly turbulated)
> cross-section of a crater, with terraced walls, a rim higher than the
> surrounding terrain and even a central peak, which then is transferred
> to a circular structure by applying trigonometric functions (?), which
> in turn are distributed randomly (also with random variations in depth,
> diameter, terracing and height of central peak) across the existing
> asteroid surface?
> 
> Where can I find the mathematical resources to design such a function?
> 
> See you in Khyberspace!
> 
> Yadgar
> 
> Now playing: Pirates of Love (Zara)
> 
> 
> ------------------------------------------------------------------------
>

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Attachments:
Download 'asteroid_01_800x600.jpg' (42 KB)

Preview of image 'asteroid_01_800x600.jpg'

Larry Hudson <org### [at] yahoocom> wrote:
> I'm attaching a photo of myself at my (electronic) organ.  I have fun
> with this picture, it's surprising how many people don't "get it".
> (Hint, it's a paste-up -- two shots cut and pasted then recopied.  I did
> this long before I had a computer, let alone, any graphics editor.)
>
>       -=- Larry -=-

WOW!  I bet you're a great drummer too!  I can hear some pretty complex
syncopation with three hands!

RG

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High!

Larry Hudson wrote:

> I'm attaching a photo of myself at my (electronic) organ.  I have fun 
> with this picture, it's surprising how many people don't "get it". 
> (Hint, it's a paste-up -- two shots cut and pasted then recopied.  I did 
> this long before I had a computer, let alone, any graphics editor.)

...but the third manual is real, isn't it? What brand is it - a Baldwin 
or a Wurlitzer?

See you in Khyberspace!

Yadgar

Now playing: Underpass (John Foxx)

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